US8588114B2 - Differential power amplifier architectures - Google Patents
Differential power amplifier architectures Download PDFInfo
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- US8588114B2 US8588114B2 US13/091,542 US201113091542A US8588114B2 US 8588114 B2 US8588114 B2 US 8588114B2 US 201113091542 A US201113091542 A US 201113091542A US 8588114 B2 US8588114 B2 US 8588114B2
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- power amplifier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
Definitions
- Radio Frequency (RF) components including power amplifiers.
- Wireless devices require RF components to prepare signals for transmission and to process received signals. It is desirable that RF components be minimal in size and configured for a variety of device designs.
- FIGS. 1-2 illustrate power amplifier architectures, according to example embodiments.
- FIG. 3 illustrates a differential power amplifier architecture, according to example embodiments.
- FIGS. 4 , 5 A-B, and 6 - 7 illustrate differential power amplifiers and antennas, according to example embodiments.
- FIGS. 8 , 9 A-B, and 10 illustrate examples of differential power amplifier architectures with balanced antennas, according to an example embodiment.
- FIGS. 11-13 illustrate examples of differential power amplifier architectures with antenna configurations, according to an example embodiment.
- the present discussion relates to differential power amplifier architectures based on Composite Right and Left Handed (CRLH) structures.
- the differential power amplifier structures may be configured to use a variety of structures.
- CRLH structures Implementations and properties of various CRLH structures are described in, for example, Caloz and Itoh, “Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications,” John Wiley & Sons (2006). CRLH structures and their applications in antennas are described by Tatsuo Itoh in “Invited paper: Prospects for Metamaterials,” Electronics Letters, Vol. 40, No. 16 (August, 2004). Designs, implementations and variations of multiband power combiners/dividers based on CRLH structures are described, for example, in the U.S. patent application Ser. No. 11/963,710, entitled “Power Combiners and Dividers Based on Composite Right and Left Handed Metamaterial Structures,” filed on Dec. 21, 2007.
- FIG. 2 illustrates another example of a power amplifier architecture 100 , which is similar to the architecture 10 of FIG. 1 , including transceiver module 20 , PAs 130 , filters 140 , and switch 142 , wherein instead of a single antenna a balanced antenna 142 is coupled to the switch 180 .
- the balanced antenna 142 has separate antennas 150 and 160 coupled through a BALUN 170 so as to introduce a 180° phase difference for signal balancing between the antennas 150 , 160 .
- FIG. 3 illustrates an example of a differential power amplifier architecture 300 with an antenna 360 .
- the transceiver module 320 processes base-band signals in multiple bands, and only the Tx paths and components for three bands, band 1 , band 2 , and band 3 , which are schematically illustrated in FIG. 3 .
- the transceiver module 320 has single pin-outs respectively assigned for the band 1 , band 2 and band 3 in this example; however, a double pin-out for each band may be used to enable a differential input of the PA 330 .
- Each of the power amplifiers 330 , PA 1 , PA 2 and PA 3 is designed to have two outputs to provide 180° phase offset between two output signals, a 0° output signal and a 180° output signal, so as to provide a differential output.
- Such a PA with a differential output and/or a differential input may be designed based on CRLH structures that provide flexible phase selections.
- a differential filter 336 is coupled to each PA 330 to receive and filter the 0° and 180° output signals for each band.
- a 180° hybrid 340 is coupled to the filter 336 to generate an in-phase output signal from the 0° and 180° output signals and a cancelled output signal from the 0° and 180° output signals.
- the in-phase output signal is transmitted from one of the output pins of the 180° hybrid to a switch 350 , whereas the cancelled output signal is terminated at the other output pin of the 180° hybrid.
- 180° hybrids include a rat-race coupler and a branch-line coupler with an additional 90° delay line. These 180° hybrids may be designed based on CRLH structures. Although all the paths associated with the band 1 , band 2 and band 3 are illustrated to have differential configurations, a less number of differential configurations can be used, leaving the other paths single-ended, depending on applications and space considerations. However, in general, all differential configurations are desired for CMOS compatibility. Similar to the system of FIG. 1 , this architecture 300 has the switch 360 , such as a SP3T switch, to select one of the signal paths to send the signal, i.e., the enhanced in-phase output signal, in the selected band to the antenna.
- the switch 360 such as a SP3T switch
- FIG. 4 illustrates an example of a differential power amplifier architecture 400 with an antenna 416 , including transceiver module 420 , PAs 410 , filters 412 , and switch 418 as previously described.
- This architecture 400 has Wilkinson power combiners 414 , labeled 1 , 2 and 3 instead of the 180° hybrids used in the architecture 300 of FIG. 3 .
- Each of the Wilkinson power combiners 414 operates to combine the 0° and 180° output signals to generate an enhanced in-phase output signal.
- the Wilkinson power combiner 414 may be designed based on CRLH structures to include two transmission lines having phases of 90° and ⁇ 90°, respectively. To obtain the in-phase output signal, other pairs of phases may be used, e.g., 270° and 90°, ⁇ 90° and ⁇ 270°, etc.
- FIG. 5A illustrates an example of a differential power amplifier architecture 450 with an antenna 460 , including transceiver module 452 , PAs 454 , filters 456 , and a switch as previously described.
- This system has an N-way Wilkinson power combiner 470 coupled to the filters 458 , labeled 1 , 2 and 3 .
- the N-way Wilkinson power combiner 470 operates to combine the 0° and 180° output signals to generate an enhanced in-phase output signal in each band, which is then transmitted to the antenna 460 .
- the N-way Wilkinson power combiner 470 can be designed based on CRLH structures that provide flexible phase selections.
- FIG. 5B illustrates an example of a differential power amplifier architecture 500 having a plurality of filters 530 coupled to an N-way Wilkinson Combiner 550 .
- the inputs are labeled, A 1 , A 2 , A 3 , and the output is B.
- the N-Way Wilkinson Combiner 550 includes Wilkinson combiners 536 , each coupled to one of multiple transmission lines 540 .
- each filter 530 has multiple inputs and multiple outputs. Alternate embodiments may employ different numbers of Wilkinson combiners and transmission lines.
- FIG. 6 illustrates an example of a differential power amplifier architecture 600 with an antenna 660 .
- This architecture 600 includes a transceiver module 620 coupled to multiple transmitter paths, wherein a transmitter path for one band N which is structured to branch out into paths for multiple sub bands 1 , 2 and 3 .
- a signal in this band N is sent from the transceiver module 620 to a PA 630 , which has two outputs to provide 180° phase offset between two output signals, a 0° output signal and a 180° output signal, so as to provide a differential output.
- a PA 630 with a differential output and/or a differential input can be designed based on CRLH structures that provide flexible phase selections.
- the 0° output signal and the 180° output signal are then split into the sub bands 1 , 2 , and 3 in this example.
- the number of sub bands and the frequency range of each sub band may vary depending on applications. For example, a band ranging from 1.7 GHz to 2 GHz may be comprised of a sub band 1 ranging 1920-1980 MHz, a sub band 2 ranging 1850-1910 MHz and a sub band 3 ranging 1710-1785 MHz.
- Differential filters 636 labeled 1 ′, 2 ′ and 3 ′, are coupled to the PA 630 to receive and filter the 0° and 180° output signals for the sub bands 1 , 2 and 3 , respectively.
- two triplexers (shown in FIG. 6 and various other figures as three branches off each of the output signals of the corresponding PA), one for the 0° output signal path and the other for the 180° output signal path, may optionally be included. These diplexers play a role of segregating and directing signals into right paths when the filters 636 , labeled 1 ′, 2 ′ and 3 ′, do not have sharp response characteristics so there may be overlaps between sub bands.
- Phase shifting elements 640 labeled 1 ′, 2 ′ and 3 ′, are coupled to the respective filters 636 to generate in-phase output signals from the 0° and 180° output signals for the respective sub bands.
- phase shifting element e.g., a rat-race coupler and a branch-line coupler with an additional 90° delay line
- phase shifting elements may be designed based on CRLH structures.
- This architecture 600 has a switch 650 , such as an SP3T switch, coupled to the phase shifting elements 1 ′, 2 ′ and 3 ′ to select one of the signal paths to send the signal, i.e., the in-phase output signal, in the selected sub band to the antenna 660 .
- a single antenna 760 is used for the transmitter in the examples illustrated in FIGS. 3-7 .
- a balanced antenna with a BALUN, as shown in FIG. 2 may be used instead of the single antenna for applications where the antenna is desired to be immune to noises.
- FIG. 8 illustrates an example of a differential power amplifier architecture 800 with a balanced antenna 880 .
- the balanced antenna 880 has a 0° antenna and a 180° antenna without a BALUN to transmit 0° and 180° output signals, respectively. Only the Tx path associated with the band N is schematically shown in this figure.
- the architecture 800 is structured to have a differential configuration throughout.
- the pin-outs of the transceiver 820 for the band N are structured differentially.
- the PA 830 is designed to have differential inputs and outputs. Such a PA 830 may be designed based on CRLH structures.
- a differential filter 850 is coupled to the PA 830 .
- the 0° and 180° output signals are respectively sent to the 0° and 180° antennas, 860 , 880 .
- FIG. 9A illustrates an example of a differential power amplifier architecture 900 with a dual-band balanced antenna 916 , 920 .
- the dual-band balanced antenna 916 , 920 includes a 0° dual-band antenna 920 and a 180° dual-band antenna 916 without a BALUN to transmit 0° and 180° output signals for the dual band, respectively. Only the Tx path associated with the bands 1 and 2 is schematically shown in this figure.
- the architecture 900 is structured to have a differential configuration throughout.
- the pin-outs of the transceiver 910 for the dual band, band 1 and band 2 are structured differentially.
- the PA 912 is designed to operate for the dual band and have differential inputs and outputs.
- the phases associated with the differential paths may be chosen to have 0° in the band 1 and ⁇ 180° in the band 2 along one path and 180° in the band 1 and 0° in the band 2 along the other path.
- the band 1 is assumed to be lower in frequency than the band 2 .
- phase is a decreasing function of frequency.
- a dual-band differential PA may be designed based on CRLH structures by utilizing the flexible phase selection capability.
- a dual-band differential filter 914 is coupled to the PA 912 .
- the 0° output signal in the band 1 and the ⁇ 180° output signal in the band 2 are sent to the 0° dual-band antenna 916 , 920 , whereas the 180° output signal in the band 1 and the 0° output signal in the band 2 are sent to the 180° dual-band antenna.
- FIG. 9B is a structure 950 having a transceiver 952 supporting multiple frequency bands.
- the transceiver 952 is coupled to the power amplifier 954 which outputs the bands with the phase offset as indicated in FIG. 9B .
- the power amplifier is coupled to multiple filters, a first filter 956 to filter band 1 , and second filter 958 to filter band 2 .
- the second filter 958 is coupled to multiple antennas, 970 , 960 .
- FIG. 10 illustrates an example of a differential power amplifier architecture 1100 with a transceiver module 1102 and balanced antennas 1120 .
- the balanced antennas 1120 include: one pair of a 0° antenna 1114 and a 180° antenna 1110 without a BALUN for the band 1 to transmit 0° and 180° output signals for the band 1 , respectively; and another pair of a 0° antenna 1112 and a 180° antenna 1108 without a BALUN for the band 2 to transmit 0° and 180° output signals for the band 2 , respectively.
- Only the Tx path associated with the bands 1 and 2 is schematically shown in this figure. Similar to the system of FIG.
- this architecture 1100 is structured to have a differential configuration throughout; the pin-outs of the transceiver for the dual band, band 1 and band 2 , are structured differentially; and the PA 1104 is designed to operate for the dual band and have differential inputs and outputs based on CRLH structures.
- the phases associated with the differential paths may be chosen to have 0° in the band 1 and ⁇ 180° in the band 2 along one path and 180° in the band 1 and 0° in the band 2 along the other path.
- the band 1 is assumed to be lower in frequency than the band 2 .
- Diplexers, diplexer 1 1116 and diplexer 2 1106 are placed on differential paths.
- the diplexer 1 1116 is coupled to the 0° output of the PA 1104 to direct the 0° output signals in the band 1 and the band 2 to the 0° band 1 antenna 1114 and the 0° band 2 antenna 1112 , respectively.
- the diplexer 2 1106 is coupled to the 180° output of the PA 1104 to direct the 180° output signals in the band 1 and the band 2 to the 180° band 1 antenna 1110 and the 180° band 2 antenna 1108 , respectively.
- FIG. 11 illustrates an example of a differential power amplifier architecture 1150 with a Tx/Rx antenna 1162 , including a transceiver module 1152 , a PA 1154 , and a filter 1156 as described previously. Part of the Rx path is shown in this architecture 1100 to indicate that the switch 1158 is used to select a Tx path or a Rx path depending on the operation mode of the Tx/Rx antenna 1162 .
- the Tx path associated with the band N includes the similar component as in the system of FIG. 3 or FIG.
- phase shifting element 1160 may be a 180° hybrid (e.g., a rat-race coupler and a branch-line coupler with an additional 90° delay line), a Wilkinson power combiner, or any other suitable phase shifting device to generate in-phase signals.
- the pin-outs of the transceiver for the band N are structured to be differential in this example, but a single-ended pin-out may also be used.
- FIG. 12 illustrates an example of a differential power amplifier architecture 1200 with a Tx/Rx antenna 1220 .
- This architecture 1200 is similar to the system of FIG. 11 , including a transceiver module 1210 , a PA 1212 , a filter 1214 and a phase shifter 1216 as described previously, except that a duplexer 1218 is used for the selection of a Tx path or a Rx path.
- the dual-band scheme illustrated in this document can be extended to a multiband scheme by utilizing, for example, extended-CRLH (E-CRLH) structures. Techniques to design CRLH-based RF components for dual-band and multiband operations are described in the aforementioned US patent applications.
- E-CRLH extended-CRLH
- FIG. 13 illustrates a differential power amplifier 1300 having a transceiver 1302 coupled to PA 1304 filter 1306 , and phase shifter 1308 .
- the architecture 1300 incorporates a duplexer 1310 coupled to two antennas 1314 , 1312 .
- a receive path is provided from duplexer 1310 for 0° and 180° signals.
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US13/091,542 US8588114B2 (en) | 2010-04-21 | 2011-04-21 | Differential power amplifier architectures |
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Cited By (2)
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CN104767494A (en) * | 2014-01-03 | 2015-07-08 | 宏达国际电子股份有限公司 | power amplifier |
CN105519010A (en) * | 2014-06-20 | 2016-04-20 | 华为技术有限公司 | Signal processing communication system, signal processing communication device and base station |
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US10218310B2 (en) | 2016-09-09 | 2019-02-26 | Skyworks Solutions, Inc. | Power amplifier systems with differential ground |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4904966A (en) * | 1987-09-24 | 1990-02-27 | The United States Of America As Represented By The Secretary Of The Navy | Suspended substrate elliptic rat-race coupler |
US20080232506A1 (en) * | 2004-04-20 | 2008-09-25 | Matsushita Electric Industrial Co., Ltd. | Reception Device, Transmission Device, and Radio System |
US20090295473A1 (en) | 2008-05-28 | 2009-12-03 | Alexandre Dupuy | Power Amplifier Architectures |
US20100062730A1 (en) * | 2006-03-21 | 2010-03-11 | Broadcom Corporation | Rf transceiver front-end |
US20100207703A1 (en) | 2009-02-18 | 2010-08-19 | Rayspan Corporation | Metamaterial power amplifier systems |
US20100260082A1 (en) * | 2009-04-09 | 2010-10-14 | Lum Nicholas W | Shared multiband antennas and antenna diversity circuitry for electronic devices |
US7839236B2 (en) | 2007-12-21 | 2010-11-23 | Rayspan Corporation | Power combiners and dividers based on composite right and left handed metamaterial structures |
US7855696B2 (en) * | 2007-03-16 | 2010-12-21 | Rayspan Corporation | Metamaterial antenna arrays with radiation pattern shaping and beam switching |
US8334734B2 (en) * | 2009-08-25 | 2012-12-18 | Hollinworth Fund, L.L.C. | Printed multilayer filter methods and designs using extended CRLH (E-CRLH) |
-
2011
- 2011-04-21 US US13/091,542 patent/US8588114B2/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4904966A (en) * | 1987-09-24 | 1990-02-27 | The United States Of America As Represented By The Secretary Of The Navy | Suspended substrate elliptic rat-race coupler |
US20080232506A1 (en) * | 2004-04-20 | 2008-09-25 | Matsushita Electric Industrial Co., Ltd. | Reception Device, Transmission Device, and Radio System |
US20100062730A1 (en) * | 2006-03-21 | 2010-03-11 | Broadcom Corporation | Rf transceiver front-end |
US7855696B2 (en) * | 2007-03-16 | 2010-12-21 | Rayspan Corporation | Metamaterial antenna arrays with radiation pattern shaping and beam switching |
US7839236B2 (en) | 2007-12-21 | 2010-11-23 | Rayspan Corporation | Power combiners and dividers based on composite right and left handed metamaterial structures |
US20090295473A1 (en) | 2008-05-28 | 2009-12-03 | Alexandre Dupuy | Power Amplifier Architectures |
US20100207703A1 (en) | 2009-02-18 | 2010-08-19 | Rayspan Corporation | Metamaterial power amplifier systems |
US20100260082A1 (en) * | 2009-04-09 | 2010-10-14 | Lum Nicholas W | Shared multiband antennas and antenna diversity circuitry for electronic devices |
US8334734B2 (en) * | 2009-08-25 | 2012-12-18 | Hollinworth Fund, L.L.C. | Printed multilayer filter methods and designs using extended CRLH (E-CRLH) |
Non-Patent Citations (1)
Title |
---|
Itoh, "Invited paper: Prospects for Metamaterials," Electronics Letters, vol. 40, No. 16 (Aug. 2004). |
Cited By (5)
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CN104767494A (en) * | 2014-01-03 | 2015-07-08 | 宏达国际电子股份有限公司 | power amplifier |
US20150194941A1 (en) * | 2014-01-03 | 2015-07-09 | Htc Corporation | Power amplifying apparatus |
US9473084B2 (en) * | 2014-01-03 | 2016-10-18 | Htc Corporation | Power amplifying apparatus |
CN104767494B (en) * | 2014-01-03 | 2018-05-22 | 宏达国际电子股份有限公司 | power amplifier |
CN105519010A (en) * | 2014-06-20 | 2016-04-20 | 华为技术有限公司 | Signal processing communication system, signal processing communication device and base station |
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